Can't remove the noise in this pic
Feb 24, 2020 08:42:49 #
Feb 24, 2020 08:55:52 #
Feb 24, 2020 09:04:52 #
I agree with William. Don't mess with it. A good deal of it isn't noise.
--Bob
--Bob
johnsnap1947 wrote:
Have tried everything. Any suggestion?
Feb 24, 2020 09:10:48 #
sbschippers
Loc: Baltimore MD
It’s not “noise”, It’s the screen pattern from offset printing and it is not going anywhere. Anything you do to reduce the dots would be at the expense of overall sharpness.
Feb 24, 2020 09:18:31 #
johnsnap1947 wrote:
Have tried everything. Any suggestion?
It wouldn't be noise if the kids would simply get their instruments in tune.
Feb 24, 2020 09:26:14 #
It is hard because it is not noise it is grain and has " physical structure " if it was sky you could use a light Gaussian blur . you can try define 2 in the nik suite or Topaz for noise programs . I would first try in Photoshop CSS ACR adobe camera Raw . In camera raw under the sharpen icon drop down to masking and move masking about 25% then under noise reduction move the luminance slider to the right and zoom 100% to see the grain . When you move the luminance slider you will activate luminance detail slider and luminance contrast it is now a balancing act between these sliders of sharpness , luminance detail , and contrast with some masking . Masking keeps some sharp detail sharp while allowing others to soften or blur so trial and error with this dance to get good results experience will win out here...Steve Perry has a good Ebook on This it is a small fee for added EXPERIENCE to this problem that can occur with high ISO , high shutter , low light , shooting ....But not happening here in this situation.. it is grain...
Feb 24, 2020 09:29:07 #
Feb 24, 2020 09:31:20 #
Feb 24, 2020 13:20:32 #
johnsnap1947 wrote:
Have tried everything. Any suggestion?
That isn't noise, it is the dots of ink from the printing process.
The only way to get shots without those dots is if you can find a photographic print of the original and use a flat field copy lens.
Feb 24, 2020 13:50:01 #
johnsnap1947 wrote:
Have tried everything. Any suggestion?
It's not noise. It's a regular pattern created by either a half-tone or line screen printing process. Leave it as it is. Unless you want to get messy with fractals.
Feb 24, 2020 13:51:47 #
Feb 24, 2020 14:25:00 #
johnsnap1947
Loc: New Fairfield, CT
Thanks much but I can't produce the original pic. Still seems like even though it's not noise, I should be able to separate it from the rest of the pic then delete it whatever it is. I'll keep trying. That's the way I learn things. Thanks again.
John
John
Feb 24, 2020 15:15:03 #
johnsnap1947 wrote:
Thanks much but I can't produce the original pic. Still seems like even though it's not noise, I should be able to separate it from the rest of the pic then delete it whatever it is. I'll keep trying. That's the way I learn things. Thanks again.
John
John
No, you won't be able to separate the dot pattern from the image. If you look closely, you will notice that it is those dots that create all the details. You could apply blur to the image to the point where the individual dots lose their distinctive quality, but then it will just look like a blurry image.
Feb 24, 2020 15:55:40 #
I tried using a FFT to smooth things out but that requires a regular pattern and this pattern isn't quite regular.
It wouldn't have done much other than smooth things out, the information is not there to reproduce details in the faces.
https://www.uglyhedgehog.com/user-page?upnum=2945
It wouldn't have done much other than smooth things out, the information is not there to reproduce details in the faces.
https://www.uglyhedgehog.com/user-page?upnum=2945
Feb 24, 2020 23:14:14 #
johnsnap1947 wrote:
Thanks much but I can't produce the original pic. Still seems like even though it's not noise, I should be able to separate it from the rest of the pic then delete it whatever it is. I'll keep trying. That's the way I learn things. Thanks again.
John
John
You can use a Fast Fourier Transform (FFT) to remove most of the halftone dots, but the image will not be quote as sharp. With your approval, I would like to post a sample FFT of your picture that I have done.
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